Case toughening of aluminum-lithium forgings

Details Case toughening of aluminum-lithium forgings Case toughening of aluminum-lithium forgings

1990-04-02

1991-09-03

Roy, Upendra

Metal treatment

Compositions

Heat treating

148 127A, 148403, C22F 104

Patent

active

050451251

ABSTRACT:
A component composed of a rapidly solidified aluminum-lithium alloy is subjected to thermal treatment at a temperature greater than 500.degree. C. for a time period greater than 5 hours under a protective atmosphere. Thus case toughened, the component exhibits notched impact toughness from 40 to 250% greater than that exhibited prior to the thermal treatment.

REFERENCES:
patent: 4643780 (1987-02-01), Gilman et al.
patent: 4661172 (1987-04-01), Skinner et al.
patent: 4747884 (1988-05-01), Gayle et al.
patent: 4804423 (1989-02-01), Dubost
patent: 4844750 (1989-07-01), Cho et al.
P. G. Partridge, "Oxidation of aluminium-lithium alloys in the solid and liquid states", Int. Mat. Review, 35, No. 1, 37 (1990).

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